Add fuzzer test for preg_parser

components/policy/core/common/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//testing/libfuzzer/fuzzer_test.gni")
 
 group("common") {
   if (is_component_build) {
     public_deps = [
       "//components/policy",
     ]
   } else {
     public_deps = [
       ":internal",
     ]
@@ skipping 133 matching lines @@
     "//url",
   ]
 
   if (is_win) {
     libs = [
       "shlwapi.lib",
       "userenv.lib",
       "ntdsapi.lib",
     ]
   }
-  if (is_win || is_chromeos) {
+  # Compile on Linux for fuzzer and since code is reused on Chrome OS.
+  if (is_win || is_linux) {
     sources += [
       "preg_parser.cc",
       "preg_parser.h",
       "registry_dict.cc",
       "registry_dict.h",
     ]
   }
   if (is_android) {
     sources += [ "cloud/component_cloud_policy_service_stub.cc" ]
     sources -= [
@@ skipping 119 matching lines @@
     "policy_map_unittest.cc",
     "policy_service_impl_unittest.cc",
     "policy_statistics_collector_unittest.cc",
     "remote_commands/remote_commands_queue_unittest.cc",
     "remote_commands/remote_commands_service_unittest.cc",
     "schema_map_unittest.cc",
     "schema_registry_tracking_policy_provider_unittest.cc",
     "schema_registry_unittest.cc",
     "schema_unittest.cc",
   ]
-  if (is_win || is_chromeos) {
+  if (is_win || is_linux) {
     sources += [
       "preg_parser_unittest.cc",
       "registry_dict_unittest.cc",
     ]
   }
   if (is_chromeos) {
     sources += [ "proxy_policy_provider_unittest.cc" ]
   } else {
     sources += [
       "cloud/user_cloud_policy_manager_unittest.cc",
@@ skipping 10 matching lines @@
       "cloud/component_cloud_policy_updater_unittest.cc",
       "cloud/external_policy_data_fetcher_unittest.cc",
       "cloud/external_policy_data_updater_unittest.cc",
       "cloud/resource_cache_unittest.cc",
       "config_dir_policy_loader_unittest.cc",
     ]
   }
   if (is_mac || is_ios) {
     sources += [ "mac_util_unittest.cc" ]
   }
-  if (is_win || is_chromeos) {
+  if (is_win || is_linux) {
     # Needed by policy_loader_win_unittest.cc and preg_parser_unittest.cc
     data = [
       "//chrome/test/data/policy/",
     ]
   }
 
   deps = [
     ":test_support",
     "//base",
     "//base/test:test_support",
     "//components/policy:generated",
     "//components/prefs:test_support",
     "//extensions/features",
     "//google_apis",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }
+
+if (is_win || is_linux) {
+  fuzzer_test("preg_parser_fuzzer") {
+    sources = [
+      "preg_parser_fuzzer.cc",
+    ]
+    seed_corpus = "//chrome/test/data/policy/gpo/fuzzer_corpus"
+    dict = "//chrome/test/data/policy/gpo/fuzzer.dict"
+    deps = [
+      ":internal",
+      "//base",
+    ]
+  }
+}